The 1 Wire Pi Zero from AB Electronics UK is a communication board supporting the 1-Wire® protocol designed for use on the Raspberry Pi Zero. A 5V buffered I2C port is also provided on the board. The 1 Wire Pi Zero can be securely fitted to your Raspberry Pi using ourmounting kit pack.

Introduction:

The 1-Wire® port on the 1 Wire Pi Zero is based around a DS2482-100 I2C to 1-Wire® bridge device. The DS2482-100 provides bi-directional protocol conversion between the I2C port on the Raspberry Pi and any attached 1-Wire® slave devices. An ESD Protection Diode is used to protect the 1 Wire Pi Zero and Raspberry Pi from electrostatic spikes on the 1-Wire® port. Connections to the 1-Wire® port can be made through the RJ-12 socket or the solder points on the PCB. For details on configuring and using the 1-Wire® port on your Raspberry Pi click here.

The 1 Wire Pi Zero is powered through the host Raspberry Pi using the GPIO port and extended pins on the GPIO connector allow you to stack the 1 Wire Pi Zero along with other expansion boards.

A 5V input port is also provided allowing you to use an external power supply on the 1-Wire® interface, reducing the load on the Raspberry Pi. If you choose to use the external 5V input please remove the solder jumper on the board to isolate the Raspberry Pi 5V bus.

Assembly Instructions

Before using the 1 Wire Pi Zero you will need to solder the two connectors onto the PCB. We suggest soldering the 40 pin GPIO connector first and then the RJ12 connector. The RJ12 connector is supplied clipped onto the PCB.